FFmpeg read from file which is dynamically grows

When i try to to read media packets with

while(true)
{     
     av_read_frame(pFormatCtx, &packet);

}

av_read_frame return EOF after a little time although the file is still grows.

How can i force ffmpeg to read file continously?

Best 开发者_如何学CWishes

Use the pipe: protocol handler instead of a file pointer.